Tip for liquid drop dispensing container

Abstract

A liquid container includes a drop dispensing tip with a hollow stem which defines a liquid passageway and an interior partition wall in the passageway. The partition wall separates the liquid passageway into an upstream chamber and a downstream chamber. Flow communication between these two chambers is provided by a liquid passage in the partition wall. The liquid passage guides liquid against an impingement surface in the downstream chamber from which the liquid is dispensed dropwise.

We claim: 
     
       1. A liquid drop dispensing tip for a container and having a hollow stem which defines a liquid passageway and includes an interior partition wall that separates the liquid passageway into an upstream chamber which communicates with the container and a downstream chamber which terminates in a liquid outlet; said interior partition wall further defining a confined liquid passage off-center of the longitudinal axis of the liquid passageway and situated between the upstream chamber and the downstream chamber, and a rounded liquid impingement surface on the interior partition wall in the downstream chamber situated so that the liquid exiting the liquid passage contacts the liquid impingement surface before passing dropwise through the liquid outlet. 
     
     
       2. The liquid drop dispensing tip of claim 1 wherein said confined liquid passage is positioned in a spaced-apart relationship relative to said liquid impingement surface. 
     
     
       3. The liquid drop dispensing tip of claim 1 wherein the liquid impingement surface is dome-shaped. 
     
     
       4. The liquid drop dispensing tip of claim 1 wherein the confined liquid passage terminates in a crescent-shaped aperture in the interior partition wall. 
     
     
       5. The liquid drop dispensing tip of claim 1 wherein the hollow stem is provided with external threads. 
     
     
       6. The liquid drop dispensing tip of claim 1 wherein the liquid impingement surface is situated along the longitudinal axis of the hollow stem and the liquid passage terminates in an aperture in the interior partition wall spaced from the longitudinal axis of the hollow stem and from the liquid impingement surface. 
     
     
       7. The liquid drop dispensing tip of claim 1 wherein the interior partition wall defines a pair of diverging faces in the downstream chamber and wherein the liquid passage terminates in an aperture in one of the diverging faces and the rounded liquid impingement surface is defined by the other of the diverging faces.